Headlight.



I. W. LEVI/ELLEN L F. P. HMER.

HEADLIGHT.

APPLICATION FILED SEPT 2l,

Iziuod Apr. II), 19H:

. Pennsylvania, and

tively on the line .Torna` WESLEY mawELLEN, 0E RIDAI'., AND FRANK VANIA.

" HEADLIGHT.- l

Application To all whom t may concern. Be it known that we, JOHN WESLEY LEw- ELLEN and FRANK P. HOHER, residents, respectively, ,of Ridal, Montgomery county, Aldan, Delaware county, Pennsylvania,` citizens of the United States, have invented certain Improvements in 'Headlighta ofy whichfvthe 'following vis a specification. A

One-object 'ofour invention is to provide a novel combinationof parts particularly designed for use headlights, whoser construction shall be such as to prevent an objectionable .glare above a substantially horizontal plane passing through the reflector axis, while giving the ground surface yorvother` objects below said plane. '4

Itis also desired to provide a simple and inexpensive headlight including a device for cutting off the greater part of theI rays of light emitted from the reflector in lines extending above a librizontal plane passing through the center of the reflector, "while permitting the utilizationof a maximum part of the reflector surface for directingY light. rays upon objects' .to be illuminated, below this plane; lthe invention also contemplating Anovel means for retaining'in place a screen' which is usually made of frosted or ground glass, together with a novel arrangement and mounting for a secondary 'screenf These objects and otherI advantageous ends we secure as hereinafter set forth, reference being had'to the accompanying drawings, in which, ,y

Figure l is a front elevation of a headlight constructed according to our inven#` tion; and

Figs. 2 and 3 are sections taken respeco o/and b-b, Fig. l.

In the 'above drawings l represents the curved body of the reflector which preferably is given the 'ormof a paraboloid surface having asource of'light' such as' the lamp 2 mounted with-its filament at or adjacent its principal focus. Mounted within the reflector in a plane at right angles to the axis thereof is a circular glass plate 8` held in place by clips 5 soldered to or struck up from thereflector surface. That part 6 of theplate above a horizontal plane passing through the reflector axis is transparent or the vfullest illumination of Specification of Letters Patent.

'flectingsurface 1v would be ajrod 9 1s pivotedfby a suitably mounted pin 10./ Thisvrod Yis held substantially parallelwith and adjacent thel plate v3 by a set screw 11". which passes through it into a short'` lugl'12 projecting from thebracket 8, and a flat metal orbther suitably' 4formed spring 1'3is mounted between vthe bracket8 l and the plate 3 so asto hold the'y latter from rattling. v.Theupper end of the'rod 9 carries a clamp 14 in whichfis mounted an elongated vand substantially rectangular frosted glass plate 15 which is supported inta plane substantially parallel with that 8 :and `a.A short distance infront .This auxiliaryy or A in such position that its lower edge is practicallycoincident withfthe horizontal plane passing through the focus of the reflector and its height is suchthat'it effectually cuts off any lightr .rays directed upwardly from the lower part of the "reflector owing to its departure fromI a 'true parabolic curvature. Obviously the length of this secondary plate or screen may be somewhat rvaried although it is preferably about `half the diameter of the reflector opening. e

Under conditionsof use, while certain of the direct rays from the source 2 can pass through the clear part 6 of the `glass plate 3, above thev upper edgeE of the secondary screen 15, the latte secondary screen 15 is the upper quarter of the side rect rays of light from the source. by supporting the secondary screen 15 some distance in front of the main screen plate 3, these upper side portions receive direct light rays and reflect them outwardly. The reflector constructed as illustrated, when viewed from the frontv by an observer whosev l. Holl/IER, -OIF ALDAN,` PENNSYL- lllatented Apr. 110, 1917. led September 21,1915. ,SerialNq 51,841.v l i i y r `intercepts such of thel of the plate of the same..

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eyes are above the horizontal plane passing through the lamp 2, presents a translucent lower portion which when the lamp2 is in operation, presents a glowing appearance plate 3, are directed lparallel with a horizontal plane passing i illumination of a roadway and other objects l trated, or a pedestrian on lquence those rays which is not objectionable nor blinding, and with the secondary screen 1 15 placed as shown, any light rays reflected above the top edge of the part 7 are cut off. As a consefroin the source which are reflected through the clear portion G of the downwardly below or through the lamp, thus giving the desired below this plane, upon which the head-light is directed. It is noted that the direct rays of light passing out of the reflector` in lines below the top edge thereof and above the top edge of the secondary cient to cause any objectionable glare or blinding effect, so that the driver of a car approaching such a head-light as that illuswhom the headlight is directed, is enabled to clearly see the fully illuminated road-way lwithout experiencing the blinding glare which characterizes headlights as ordinarily made.

It is to be noted that without departing from our invention the plate or piece 3 constituting the primary screen may have its parts 6 and 7 made structurally independent tion of the auxiliary screen being sufficient to cut of although in some cases it may be advantageous to employ a single piece disk whose uper half is transparent and whose lower half is frosted. Vhen for any reason it is necessary to remove or repair the primary screen, the screw llmay be disengaged from the lug 12 and the rod 9 swungdown through an angle of 90 degrees, so that neither it nor the secondary screen 'f will interfere with the work on the main screen.

Obviously in some cases the top part 6 may be altogether omitted since it has no optical fuiiction,-although preferably einployed either as an independent piece or integral with the bottom member 7.

1. The combination with a concave reflector of a source of light; a main screen of which a portiononly is transparent; andan auxiliary screen of translucent material mounted in front of said transparent pormain screen; the heightof said rays of light reflected in lines extending Copies of this patent may be obtained for screen 15, are not suiflector of a Ina-in screen;

.laterally elongated ed above a horizontal-plane passing through A 2. The combination with a concave reflector of a source of lighttherefor: a main screen of which a portion lonly is transparent; and an auxiliary screen of translucent material mounted in front of said transparent ortion of the main screen; the length o said auxiliary screen being at most insuflicient to cut off direct rays of light from the source to the outermost side portions of the reflector. l 'v 3. The combination with a concave reflector of a source of light; a main screen of which one portion is transparent and the other portion is translucent; with an auxiliary screen of translucent material mounted in front of the transparent'part of the main screenA and extending to a'V height sufficient to cut ofl' practically all rays of light reflected above a horizontal plane passing through the focus of the reflector while permitting passage of those rays of light reflected parallel with or downwardly toward said lane.

4. he combination with aconcave reflector of a source of light; a mainscreen therefor; and an auxiliary screen mounted in front ofthe main screen but adjustable forwardly to permit removal of the latter.

5. The combination with a concave reotally mounted in front ofsaid screen and adjustable on its pivot from such position through'an angle of substantially 90 degrecs; with an auxiliary screen carried by said standard.

6. The combination of a. concave reflector; a substantially circular glass screen mounted between its focus and its open end; and al secondary screen mountthe reflector axis in front of said main screen.

7 The combination of a concave reflector; a mainscreen mounted therein; a bracket in front of the main screen; a secondary screen carried by said bracket;'a standard also carried by the'bracket; with a laterally clon# gated auxiliary screen supported by said standard in a plane parallel with that of the main screen adjacent the central portion thereof.

JOHN VESLEY'LEWELLEN. FRANK P. HOMER.l

Washington, D. G.

a standard pivv ve cents each, by addressing the Commissioner of Patents, j 

